Shift-lock release for typewriters



Dec. 13, 1927.

FAA NK A. Mia/v58 awe-map Patented Dec. '13, 1927.

PATENT OFFICE.

FRANK ASHLEY WARNER, 013 LOS ANGELES, CALIFORNIA.

SHIFT-LOCK RELEASE FOR TYPEWRITERS.

Application filed May 26, 1924. Serial No. 715,971.

My invention relates to and has for its purpose the provision of; a shift lock and release for typewriters embodying a shift key and-a shift key lock combined insucli man ner that only the use of a single key bar is necessaryto move and lock the typewriter carriage in shifted position and then release the locking means to allow the carriage to return tonormalposition. V I I V It is also a purpose of. my invention to provide a shift lock and release mechanism which allows the depression of the'key bar t key or the shift key with either the shi lock, a locking of the. key bar in depressed position by the shift key lock and a release of the bar by an actuation of the shift key.

A- further purpose of" my invention is the provision of a key head for the keys of type writers which operates to maintain the head against rotation on the key bar and z the permanent securing of the legend bearing disk in proper reading position within the key head. g 7 I willdescribc only one form of shift lock and release mechanism and one form of typewriter key each embodying my invention,

and will then point out the novel features thereof in claims. v

In the accompanying drawings Figure 1 is a view showing in side elevation one form of shift lock andrelease mechanism embodying my invention in normal position and with one key thereofin section;

Figure 2 is a view similar to Figure 1,.

with the key bar of the mechanism in; depressed and locked position;

Figure 3 is a view similar to Figure 2, showing the locking means of the mechanism moved to released position to allow the key bar to return to elevated position;

Figure 4 is a top plan view of the mechanism'shown in Figure 3; V

Figure 5 is a detail perspective view ofthe bracket embodied in the mechanism shown in the preceding views;

Figure 6 is a sectional View line 6-6 of Figure 1.; v

Figure? is a perspective view of the head and shank of the key'shown in Figure 1.

Sin characters refer to aim:

act; of the several views:

taken on the provided with a key.

Referring specifically to the drawings, and particularly to Figure .1, my inventionin its present embodiment is shown as applied to a key bar B which is of conventional form with the exception that its outer end is not This key bar is pivoted at the point indicated at 15, so that its outer end is capable of being lowered or elevated, and the bar is normally urged to elevated position by means of a spring 16. This. key bar is" operatively connected (through suitable means not shown) to the carriage of a typewriter so that when its outer end is depressed the carriage will be moved to what is commonly known as shifted position.

The mechanism embodying my invention comprises a bracket which, as illustrated to advantage in Figure 5, comprises a fiat bar 17 having fingers 18, a pair of lips 19 on the upper edge of the bar and a lip 20 on the lower edge of the'bar, and interposed between the upper lips. All of the lips are adapted to be bent to engage the key bar B and to thus securely hold the bracket in position upon the bar, as clearly shown in Figure 1. The. bar 17 is also formed with ex tensions 21 and 22 in which pins 23 and 24,

respectively, are mounted to providepivots for a pair of key levers 25 and 26, respectively. The lever 26 is provided at one end with what I term a. lock key 27, while the lever 25 is formed at one end with a shift key 28. with a slot 29 which receives the pin 24 and a roller 30' mounted on the pin and having rolling contact with the edges of the slot so as to insure proper sliding movement of the leveron the pin. The opposite end oft he lever- 26 is provided with a release member on lug 31 which is adapted to engagethe cam surface 32 of a locking lever 33 pivoted at the point indicated at 34 and normally urged in a clockwise directionby means of-a spring 35. The lock lever 33 constitutes part of a means for lockingthe siding through an opening: 37 ft flcd' ifi end of the bar 17;

The lock key lever 26 is formed the bar is locked in depressed position to causesaid release member to engage the locking lever and move the latter free of said pin whereby said bar is allowed to return to elevated position. p

3. In combination, a key bar, means for locking the bar in depressed position comprising a pin and a locking lever urged to engage the pin when the bar is in depressed position, a locking key on the bar, a release member carried by the locking key, said key being operable to depress the bar and movable on the bar to move the release member to a position in which the locking lever is allowed to engage said pin for securing the bar in depressed position. and a shift key pivoted on the bar and operatively connectedto the locking key for depression of the and a shift key including a lever .pivotally all) bar and to simultaneously maintain the release member in a position'in which it'engages the locking lever to preventthe latter from engaging the pin whereby thebar can" ted to allow of limited longitudinal movement thereof, a release lug carriedby the 1ever,-means for locking the bar in depressed position comprising a pin fixed to the bar and a pivoted locking lever having a cam urged into engagement with the pin so that when the bar is depressedthe pin will cooperate with the cam to move the locking lever into locking engagement with the pin,

connected to the locking key lever in such manner that when depressing the bar by means of the shift keythe release lug en gages the cam to prevent the locking lever from lockingly engaging the pin and to ac-v.

tuate the locking key lever when the bar is locked in depressed position to cause the release lug to engage said cam andmove the locking lever free of said pin whereby the bar can be returned to elevated position.

5. In combination, a key bar, a bracket secured to the bar, a locking'key including a lever pivoted on the bracket, and slotted to allow of limited longitudinal movement thereof, a release lug carried by tl1e 'lever, means for locking the bar in depressed position comprising a pin fixed to the bar and a pivoted locking lever having a cam urged into engagement with the pin so that when the bar is depressed the pin will co-operate with the cam to move the locking lever into locking engagementwith the pin,'and a' shift key including a lever pivotally connected to the locking key lever in such manner that 7 when depressing the] bar by means of the shift key the release lug engages the cam to prevent the locking lever from locking'ly en- 7 pressed.

position to cause the releaselug to engage said cam'and' move the locking lever free of said pin whereby the bar can be returned to elevated position.

6. In combination, a shift key bar,'means for locking the bar in depressed position comprising a pin fixed to the bar, and a lock lever'pivoted and normally urged to engage the pin when the bar is in depressed POSl tion, a locking key mounted for movement on the bar, a release member carried by the locking key, and a shift key mounted for movement on the bar and pivotally connected to the locking key, so as to move the lat terwhen the bar is locked in depressed posi= tion to cause said release member to'engage the locking lever and move the latter free of said pin whereby the bar is allowed to i return to elevated position.

1. A device of the character described comprising a bracket adapted to be secured to a shift key bar, a locking key mounted for movement on thebracket and having a release member, and a shift key operatively connected to the locking key and movably mounted on the bracket in the manner and for the purpose described.

8. A device of the character described comprising a bracket adapted to be secured to a shift key bar, a locking key mounted for pivotal and sliding movements on the bracket and having'a release member adapted to occupy two extreme positions and a shift key pivotally connected to said looking key, whereby said release member is movable to one extreme position when the locking key is depressed and to the other extreme position when the shift key is derod 9. A device of the character described as v embodied in claim 8 wherein the locking key has a pin and slot connection with said bracket.

10. A device of the character described as f embodied in claim 8 wherein said bracket is provided with bendable lugs for clamping means to lock the bar in depressed position,

and means mounted for movement on the bar and operatively connected to the second means-by which the bar can be depressed withoutvthe first means, locking the bar. I

12. In combination, a key lever, a head of substantially disk form .on the lever, said head and :1 single lip between said lips pro- 1ect1ng from the opposite side of the head,

said 132111. of lips having their free ends pointed and upturned t0 PTOVldQ pl ongs, :1

cover for the hencl having a legendb ea l i ng disk therein, and n iegns for securing the cover fiothe head t9 flegt penetiqatlin ehgqggment 01 the prongs with the disk, to thereby prevent IOtlitifll'l of the. latter upon H19 head.

F ANK ASHLEY WARNER. 

